More than 99% of pregnant women admitted to hospital with Covid-19 are unvaccinated – with the Delta variant of coronavirus posing a significantly greater risk of severe disease, scientists have said. Researchers at Oxford University have described their findings as “concerning”, saying that one in 10 pregnant women admitted to hospital with symptoms of Covid-19 often require intensive care. In a study, published in an online server called medRxiv, the scientists said that vaccinations are able to offer effective protection from the risk of becoming severely ill from Covid-19, with far fewer numbers from vaccinated groups in hospital compared with those who have not had the jab.